Optimization of the use of mother liquor in the synthesis of HKUST-1 and their performance for removal of chromium (VI) in aqueous solutions

Ratna Ediati*, Mita Aris Setyani, Dety Oktavia Sulistiono, Eko Santoso, Djoko Hartanto, Mohd Mustafa Al Bakri Abdullah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

In this study, copper-benzene tricarboxylic (Cu-BTC), or better known as HKUST-1, was successfully synthesized using the solvothermal method in a solvent mixture of water, ethanol and N,N-Dimethylformamide (DMF). The mother liquor from the first synthesis was reused as a solvent for the subsequent HKUST-1 synthesis for up to four repetitions, cutting back the use of fresh solvent as much as 37 %. The fifth material obtained showed similar thermal stability and specific surface area to that of the first one, even though the surface morphology turned from an octahedral shape in the first material to an irregular shape in the fifth material. The results of the adsorption study on Cr(VI) in aqueous media showed that the first and the fifth materials had adsorption capacities of 91 mg/g and 100 mg/g respectively. Both adsorbents followed a pseudo-second order adsorption kinetics with a Langmuir isothermal adsorption model.

Original languageEnglish
Article number101670
JournalJournal of Water Process Engineering
Volume39
DOIs
Publication statusPublished - Feb 2021

Keywords

  • Adsorption
  • Cr(VI)
  • Green chemistry
  • HKUST-1
  • Reuse mother liquor

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